A new method for harmonic distortion analysis in class-AB stages

Author

Giustolisi, Gianluca ; Palumbo, Gaetano

Author_Institution

Dipt. di Ingegneria Elettrica Elettronica e dei Sistemi, Univ. degli Studi di Catania, Italy

Volume

50

Issue

12

fYear

2003

Firstpage

1559

Lastpage

1563

Abstract

In this brief, a new method for analytically evaluating the harmonic distortion (HD) in class-AB stages is introduced. It is based on modeling each push-pull device in the stage with a different third-order polynomial. The coefficients of these polynomials are then evaluated by straightforward computations or by pencil-and-paper analysis on the transcharacteristic of the stage. The resulting theory was validated by simulations and is able to predict the HD behavior of a class-AB stage over a wide range of input values. An example of the use of the theory for pencil-and-paper analysis is also given.

Keywords

CMOS analogue integrated circuits; circuit simulation; feedback amplifiers; harmonic distortion; operational amplifiers; polynomial approximation; power amplifiers; CMOS process; SPECTRE PSS simulation; Taylor coefficients; class-AB stages; feedback loop; harmonic distortion analysis; input-output transcharacteristic; operational amplifiers; pencil-and-paper analysis; push-pull device; third-order polynomial; two-piece linear function; Computational modeling; Design optimization; Equations; Feedback; Harmonic analysis; Harmonic distortion; High definition video; Parasitic capacitance; Power amplifiers; Solid state circuits;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/TCSI.2003.819810

Filename

1257460